London Earth is a high-resolution, systematic geochemical baseline survey of soil across the Greater
London Authority (GLA) area. More than 6000 topsoil samples were recently collected and analysed by
XRFS for total concentrations of 53 elements, plus pH and loss-on-ignition. These samples cover a wide
range of land uses and soil types. London has a large number of green spaces, including large parks,
wetlands, heaths and common-lands, borough parks, country parks and private estates, plus a range of
domestic and public gardens. The aim of the London Earth survey is to define the baseline geochemistry of
topsoils (c.5–20 cm depth) — a snapshot of the chemical make-up of soils. Characteristics of the baseline
geochemistry of some of London’s parklands are presented here
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